<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>shiyan</title>

    <style>
    .a{
        color: red;
    }
    .box{
        
        width: 500px;
        height: 500px;
        border: 1px solid;
        text-align: center;
        line-height: 500px
    }
    
    </style>
</head>
<body>
    <p class="a" style="color:blue">asdfasdfgasdgasdfasdfgasd</p>
    <div class="box">
        <p class="content">asdfasfgsdfg</p>
    </div>
</body>
</html>